| Sold | Grade | Monthly Average |
| Oct 2011 | 8.0 | $9.00 |
| Nov 2023 | 6.0 | $6.00 |
| Apr 2021 | 4.5 | $4.40 |
| Sep 2010 | 4.5 | $3.79 |
| Sep 2024 | 4.0 | $3.20 |
| Jan 2022 | 4.0 | $3.20 |
| May 2020 | 4.0 | $4.00 |
| May 2017 | 4.0 | $3.60 |
| Feb 2016 | 4.0 | $3.60 |
| Oct 2010 | 4.0 | $3.60 |
| Nov 2009 | 4.0 | $3.60 |
| Apr 2025 | 3.5 | $2.49 |
| Mar 2015 | 3.5 | $2.70 |
| Aug 2023 | 3.0 | $2.50 |
| Oct 2020 | 3.0 | $3.00 |
| Apr 2018 | 3.0 | $2.85 |
| Apr 2016 | 3.0 | $2.20 |
| Mar 2016 | 3.0 | $2.20 |
| Nov 2012 | 2.5 | $2.25 |
| Sep 2012 | 2.5 | $1.90 |
| Oct 2021 | 2.0 | $2.00 |
| Feb 2017 | 2.0 | $1.70 |